Stomach pain after exercise may be related to strenuous exercise, hunger, mental factors, digestive diseases and cold weather. 1. Strenuous exercise: If the exercise is too strenuous, it may cause the stomach and intestines to appear violent peristalsis, and then cause stomach cramps induced stomach pain. 2. Hunger: exercising on an empty stomach may cause the gastric mucosa to peristalsis on its own, which in turn induces colic and causes stomach pain. 3. Mental factors: such as too sad or too depressed and other bad emotions, after strenuous exercise, may also lead to stomach pain. 4. Digestive tract diseases: gastritis and gastric ulcer, these underlying diseases may also cause stomach pain after exercise. 5. Cold weather: the stimulation of cold air may also lead to gastrointestinal irritation, inducing stomach pain. There are many other causes of post-exercise stomach pain, first of all, you need to exclude non-disease factors caused by stomach pain, if necessary, to the regular hospital to receive examination and treatment.